Which of the following is an accurate statement about carbon monoxide?
A. It replaces oxygen in the blood's hemoglobin.
B. It is removed quickly from the atmosphere.
C. Roughly half the atmospheric CO is produced by industrial processes.
D. It is produced by photosynthesis.
Answer: A
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Though they are on the margins of the global agro-food system, organic farming practices are on the rise in the core. In growing crops and raising livestock organically, which of the following is (are) permitted?
A) composted cow manure B) commercial fertilizers C) growth hormones D) synthetic pesticides
How much more ground motion occurs when comparing a magnitude 2 earthquake to a magnitude 3 earthquake?
How much more ground motion occurs when comparing a magnitude 2 earthquake to a magnitude 3 earthquake?
- 0.1 times as much
- 2 times as much
- 10 times as much
When a light switch is turned on in a DC circuit, the average speed of electrons in the lamp is
A) the speed of sound waves in metal. B) the speed of light. C) 1000 cm/s. D) less than 1 cm/s. E) dependent on how quickly each electron bumps into the next electron.
Which of the following is typically the largest source of radiation exposure for humans?
A) artificial radiation sources B) atmospheric radon C) cosmic rays D) terrestrial radiation